ios - 当键盘显示不工作时，向上移动包含 UITextField 和 UIButton 的 UIView

Question

在主视图中，我有一个 UITableView，我有另一个 View textInputView，它包含一个 UITextField 和一个 UIButton .

当键盘显示不工作时，向上移动包含 UITextField 和 UIButton 的 UIView。

-(void)animateTextField:(UITextField*)textField up:(BOOL)up
{
    const int movementDistance = -224; // tweak as needed
    const float movementDuration = 0.3f; // tweak as needed

    int movement = (up ? movementDistance : -movementDistance);

    [UIView beginAnimations: @"animateTextField" context: nil];
    [UIView setAnimationBeginsFromCurrentState: YES];
    [UIView setAnimationDuration: movementDuration];
    textInputView.frame = CGRectOffset(textInputView.frame, 0, movement);
    [UIView commitAnimations];
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{

    [self animateTextField:textField up:YES];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
    [self animateTextField:textField up:NO];
}

如果我用 self.view 替换 textInputView，它会向上移动整个 View ，但我不希望这样做。我只想向上移动 textInputView。

这是 View 层次结构:

这是我的真实看法:

顺便说一句，我正在使用 XCode 6 和 iOS 8 SDK...

Answer 1

由于您使用的是 textInputView 的框架，它在不同的时间是不同的，因此您没有获得预期的效果，

像这样，

[self.view bringSubviewToFront: textInputView]
if(up){
  textInputView.frame = CGRectOffset(textInputView.bounds, 0 self.view.bounds.size.height - textInputView.bounds.size.height)
}else{
  textInputView.frame = CGRectOffset(textInputView.bounds, 0 self.view.bounds.size.height)
}

现在，我觉得您想在键盘出现时在键盘上方显示输入 View ，并在键盘消失时隐藏它。首选方法是观察 UIKeyboardWillShowNotification 和 UIKeyboardWillHideNotification。它还提供动画持续时间和最终键盘帧。

- (void)viewDidLoad{
  [super viewDidLoad];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

}


- (void)keyboardWillShow:(NSNotification*)note{
  NSDictionary *userInfo = note.userInfo;
  CGRect finalKeyboardFrame = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
  NSTimeInterval animationDuration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];

  float inputViewFinalYPosition = self.view.bounds.size.height - finalKeyboardFrame.size.height;
  CGRect inputViewFrame = textInputView.bounds;
  inputViewFrame.origin.y = inputViewFinalYPosition;

  [UIView animateWithDuration:animationDuration animations:^{
    textInputView.frame = inputViewFrame;
  }];

}

- (void)keyboardWillHide:(NSNotification*)note{

  NSDictionary *userInfo = note.userInfo;
  NSTimeInterval animationDuration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];

  CGRect inputViewFrame = textInputView.bounds;
  inputViewFrame.origin.y = self.view.bounds.size.height;

  [UIView animateWithDuration:animationDuration animations:^{
    textInputView.frame = inputViewFrame;
  }];

}